Load testing is the act of testing a system under load. In software engineering it generally refers to the practice of modeling the expected usage of a program by simulating multiple users accessing the program's services concurrently. As such, this testing is most relevant for multi-user systems, often one built using a client/server model, such as web servers. However, other types of software ... [MORE] 1. Apache JMeter - Graphical server performance testing tool, for both static and dynamic resources (files or CGI, Servlets, Perl scripts). It may be used to simulate a heavy load on a server or network to test its strength or to analyse overall performance under different load types. [Open Source, BSD-like] 2. JBlitz - Web stress, load and performance testing tools for testing websites, web services and web enabled applications. By Clan Productions. [Commercial] 3. LoadeaTest - A stress test tool which offers to test performance from capturing to analyzing results. The application is available for Windows platforms equipped with the .NET runtime environment. [Commercial, free restricted version] 4. OpenDemand Systems, Inc. - Web performance management software and services including stress testing, performance monitoring, and professional services. 5. PerfectLoad - A HTTP/Java load-testing tool that simulates thousands of users executing requests against a Web or application server. [Shareware] 6. PureLoad - A Java-based performance testing and analyzing tool that helps application developers by automating the process of stress testing server applications. [Commercial, trial version] 7. Red-Gate Software: .NET testing tools - The Advanced .NET Testing System (ANTS) is for load and scalability testing of .NET web services and other web applications. [Commercial, trial version] 8. The Grinder - A Java load-testing framework. It has support for testing HTTP based services and can also be used to test MOM and POP3, SMTP, FTP, and LDAP applications. [Open Source, BSD-style license] 9. Webserver Stress Tool - A HTTP-client/server load, stress and performance testing application designed to pinpoint critical issues in Web server that may prevent optimal performance. By Paessler GmbH. [Commercial, trial version] 10. Zyntax Tuxedo Adaptor - The Tuxedo Adaptor allows users to perform load, stress and performance benchmarking against applications which utilize BEA's Tuxedo. The software is solely available included in IBM/Rational testing products. [Commercial] 11. Facilita Forecast Applications - A suite of low footprint load testing tools for web, .NET and Java applications as well as for networks, databases and custom C, C++, .NET and Java APIs. [Commercial] 12. Load Testing Tools Resources - Tools that can help a website or intranet application developer to ensure that it sustains the desired load. 13. Neotys - Offers NeoLoad, a testing tool for web applications which provides monitors and results reports to pinpoint bottlenecks and performance issues, as well as application deployment services. [Commercial, trial version] 14. OpenSTA - Project to build a distributed Web load testing architecture based around CORBA. [Open Source] 15. PerformanceTester.com - A resources site by Stens Consulting Inc. Offers articles, FAQs, books, a forum, a knowledge base, links and news. 16. PerformanceXperts, Ltd. - An independent performance, load and stress testing specialist company with experience of designing and implementing performance testing strategies across many business sectors and technologies. 17. Performax, Inc. - Provides software load testing, performance analysis, tuning, optimization, and characterization services. The applied methodology is presented as well as several customers. 18. PerfTestPlus, Inc. - Offers software-testing-related services and, on its site, articles and presentations about performance testing written by Scott Barber. 19. Proxy Sniffer - Web load testing and site analysis tool implemented in Java, permitting to test and analyze the performance characteristics and the stability of Web applications under various load conditions. [Commercial, free limited version] 20. Quotium Technologies - Range of professional web load and database testing and monitoring solutions. 21. Test Today, Ltd. - Performance testing of computer-based business systems using automated testing and monitoring technologies. 22. TestingMaster - A load and stress testing tool that provides a way of testing web sites and intranet applications via web interface. [Commercial, trial version] 23. Tevron - Offers automated testing solutions for Windows platforms and focuses on load testing, application monitoring and functional testing for various enterprise applications. [Commercial] 24. Web Application Load and Stress Testing - WAPT is a load and stress testing tool for web sites and intranet applications with web interface. Accurate load simulation, run-time test data generation, recording and play back of secure HTTPS requests, clear graphs and reports. [Commercial, trial version] 25. Web Performance, Inc. - Load, stress, and performance testing software and tools for Web servers. Interactive reports tell how many real users a Web site can handle at one time and which Web pages are slow. [Commercial] 26. Web Site Optimal Performance (WSOP) - This tool checks the consistency of a web site and makes a load time analysis for all page elements. It provides a set of reports and statistic layouts representing web page download information. Available for various Windows platforms. [Commercial, trial version] 27. WebInject - A tool for automated testing of web applications and services. It can test individual components with HTTP interfaces, and is a test harness to create a suite of automated functional and regression tests. [Open source, GPL]

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